Heater



FIG. 1 is a Front Perspective view of the heater.

FIG. 2 is a Back Perspective view of the heater.

FIG. 3 is a Front view of the heater.

FIG. 4 is a Back view of the heater.

FIG. 5 is a Left Side view of the heater.

FIG. 6 is a Right Side view of the heater.

FIG. 7 is a Top plan view of the heater; and,

FIG. 8 is a Bottom plan view of the heater.

The broken line shown in the drawings are for the purpose of illustrating portions of the article that form no part of the claim design. 

CLAIM The ornamental design for a heater, as shown and described. 